Improvement in machines for forming metal-ring blanks



2 Sheets-Sheet 1.

J. ADT. MACHINES FUR FORMING METAL RING BLANKS. No.180,306. PatentedJu1y25,1e7.

*ci c1. L VU.: FZ) "Y: e

3 i E B P l e l u!!! .1, 1 p

h-"h vy l, ZIC f mi" O "u T. 1". z A

NJEFERS, PHOTO-LITHOGRFHER, WASHINGTON. D. CV

2 Sheets-Sheet 2.

J'. ADT.

MACHINES FOR FORMING METAL RING BLANKS. A v No.180,306. Patented July25,1876..

N. PETERS. PHOTVLITHOGRFNER, WASHINGTON. 12b-l:`

A srl.-

' UNrrnn STATES" irri-Enr OFFICE;

JOHN ADT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE CRAWFORDMANUFACTURING COMPANY, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR FORMING METAL-RING BLANKS.

Specification formingr part of Letters Patent No. 180,306, dated-July25, 1876; application led J anuar'y 17, 1876.

To all whom it may concern:

Be it known that I, JOHN ADr, of New Haven, in the county of New Havenand State of Connecticut, have'invented a new Machine for FormingMetal-Ring Blanks; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the letters of referencemarked thereon, to bea full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in-

Figure l, plan or top view Fig. 2, front or side view ;v Figs. 3 and 4,detached views, enlarged; Fig. 5, front-end view, a portion of themandrel-holder removed to more clearly process which will bring the twoends together, and secure them by welding, brazing, or otherwise. Theinvention, therefore, consistsin the mechanism as hereinafter described,

and recited in the several claims, whereby the wire is drawn. into themachine, wound into the required spiral form, and each successive coilcut from the main wire or coil and discharged from the machine.

A is the bed or frame of the machine, upon which the operative mechanismis arranged, and is supported upon suitable legs or foundation. B is themain shaft, arranged in bearings B', so as to turn freely. C is thedriving-shaft, arranged in bearings C1, and caused to revolve by theapplication of power thereto through a pulley, C2, or otherwise. Fromthe driving-shaft C power is communicated through a pinion,'D, to acorresponding gear, D', on the shaft B, so that the shaft B maintains aconstant revolution.

Loose upon the shaft B, and near the gear D', is a second gear, E.Through the gear D is a slide or bolt, a, which revolves with the gear,and outside the gear D is a stationary cam, b, which, as the gear Drevolves, engages with the bolt a, and draws it outward or forces itinward, as the case may be. (A spring' may be employed .to force thebolt inward, a guide, d, being here shown for that purpose.)

For reasons hereinafter described the gear E is only required to revolvea half-revolution, and then to stand before the next half. On this gearE there are two lugs, e, corresponding to the bolt a; hence, when thebolt is thrown inward toward the gear E it willcome in contact with oneof tre lugs c, and cause the gear E to revolve with the gear D' untilsuch time as the cam b will draw back the bolt, and thus free the gear Eand allow it to remain stationary until the bolt a engages the next lug.

F F F are three parallel shafts, arranged in a triangle, as seen in Fig.5. These three shafts are supported in adjustable bearings f, and areconnected by gears h at oneend, so that all revolve together; and theyare thus caused to revolve from connection with the gear E throughintermediate gears E. On the outer end of each of these shafts there isarranged a grooved roll, n, and between the three rolls is a mandrel orformer, H, on an independent shaft, H1, centrally between the threeshafts, and extending back, its rear end supported on a ball oruniversal joint, H2, as seen in Fig. 3, the other or former end of theshaft being loose in its bearing, so that it is governed in its positionby the rolls a, the rolls revolving, and a piece of wire fed to themwill cause the wire to be coiled around the former H; and these rollsare set relativelyv to each other so that the rst roll which receivesthe wire shall be a little in rear of the second roll, and that in rearof the third, so that the wire as it is coiled is guided away from thefirst roll in its complete revolution, and thus would form a continuouscoil if allowed. to revolve, and without cutting, substantially like aspiral spring, and as seen on I the mandrel in Fig. 4.

L is an auxiliary former, corresponding in diameter to the former H, andin line with it, and so that when the two are set together, as

- indicated in broken lines, Fig. 3, they form practically one. Theformer L is attached to a shaft, L1, upon which is a spring, L2, thetendency of which is to force the part L of the former toward the partH, and hold it in that position, and in that position the coiling of theWire, as before described, carries the successive coils from the formerH onto the part L, as seen in Fig. 4. The half-revolution of the gear E,as before described, imparts to the rolls n a movement sufficient tomake one complete coil, and then the disengagement occurs, and the rollsand further coiling are stopped. At this time a cutter, m, arrangedvertically beneath the former, is actuated by a lever, N, through a cam,N', on the shaft B, and is forced upon the coiled wire, and cuts thewire diagonally, as shown in Fig. 4, thus leaving on the part L of theformer only a complete single coil. This done, a cam, P, on the shaft B,through a lever, P', in connection with the shaft L1, forces the part ofthe former L away from the other part, H, and thus removes the cnt coilor ring-blank from the other portion, and allows it to fall from theformer and away from the machine, complete and ready for any subsequentoperation upon it.

In case the rin g-blank should adhere to the part L, a trip, R, isarranged upon a lever, R1, actuated by a cam, R2, (see Fig. 5,) so as toforce the ring from the former and discharge it from the machine. Whenthe ring-blank has thus been discharged the part L is permitted toreturn to its position, and at that time the engagement with the gear Eis made, and the second coil is formed, and passes onto the part L, asbefore. The wirev is passed through a guide, T, as indicated in heavybroken line, and in this guide there is arranged a clamp-bar, t,attached to a lever, T1. This lever is hung upon afulcrum, T2, andextends back, and so as to be acted upon by a cam, T3, on the shaft B,and this cam acts so that at the time when the revolution of' the rollsis stopped, as before described, the clamp will be borne down upon thewire, and so as to check it and stop the further run of the wire intothe machine; but when the rolls are revolving the clamp will be raisedfrom the wire by means of the spring or weight Ton the lever T1.

When the rolls are revolving and drawing in the wire, a pressure isnecessary upon the rolls, or rather upon the first or upper roll, andthis is produced by means of the lever Tl bearing upon a follower, T4,as seen in Fig. 5. This pressure is, therefore, removed when the leveris actuated to clamp the wire; but so soon as the clampingis released,then the pressure is brought again upon the roll to gripe the Wire, sothat releasing the pressure ot' the roll at the same time the wire isgriped prevents the possibility of the wire ruiming into the machine byany momentum which might otherwise be imparted to the rolls. Thisconstitutes two checks upon the feeding of the wire, one ot' which maybe dispensed with.

lt will be understood that for rings of different diameters acorresponding diameter of former is to be introduced, and the feed-rollsadjusted accordingly.

I claiml. The combination of the divided former H L, the rolls u, andthe cutter m, for separating successive coils to form the blanks,substantially as specified.

2. The combination of the divided former L H, the rolls a, the cutter m,and the trip R, substantially as setforth.

3. rlhe combination otI the former H, the rolls n, and the clamp t,substantially as described.

t. The combination of the former H, the rolls n, the loose gear E, withintermediate gearing to connect the saidrolls, the principal gear D',and an automatic clutch, which will engage and disengage the saidprincipal gear, to cause or stop the revolution of the rolls,substantially as described.

JOHN ADT.

Witnesses:

J oHN E. EARLE, CLARA BRoUcHroN.

